This is because `TRANSFORM_OT_edge_slide` has `OPTYPE_DEPENDS_ON_CURSOR` flag set. Due to this, invoke call to loop-cut operator was not sent from function `WM_operator_name_call_ptr_with_depends_on_cursor`. Since `edge slide` operator does not depend on actual cusor position, we can remove this operator flag to fix the problem. Pull Request: https://projects.blender.org/blender/blender/pulls/113140